135 lines
4.6 KiB
Python
135 lines
4.6 KiB
Python
"""
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Utilities for end-users.
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"""
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import __main__
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from collections import namedtuple
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import logging
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import traceback
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import re
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import os
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import sys
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from jedi import Interpreter
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READLINE_DEBUG = False
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def setup_readline(namespace_module=__main__, fuzzy=False):
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"""
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This function sets up :mod:`readline` to use Jedi in a Python interactive
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shell.
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If you want to use a custom ``PYTHONSTARTUP`` file (typically
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``$HOME/.pythonrc.py``), you can add this piece of code::
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try:
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from jedi.utils import setup_readline
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except ImportError:
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# Fallback to the stdlib readline completer if it is installed.
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# Taken from http://docs.python.org/2/library/rlcompleter.html
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print("Jedi is not installed, falling back to readline")
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try:
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import readline
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import rlcompleter
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readline.parse_and_bind("tab: complete")
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except ImportError:
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print("Readline is not installed either. No tab completion is enabled.")
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else:
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setup_readline()
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This will fallback to the readline completer if Jedi is not installed.
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The readline completer will only complete names in the global namespace,
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so for example::
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ran<TAB>
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will complete to ``range``.
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With Jedi the following code::
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range(10).cou<TAB>
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will complete to ``range(10).count``, this does not work with the default
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cPython :mod:`readline` completer.
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You will also need to add ``export PYTHONSTARTUP=$HOME/.pythonrc.py`` to
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your shell profile (usually ``.bash_profile`` or ``.profile`` if you use
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bash).
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"""
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if READLINE_DEBUG:
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logging.basicConfig(
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filename='/tmp/jedi.log',
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filemode='a',
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level=logging.DEBUG
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)
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class JediRL:
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def complete(self, text, state):
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"""
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This complete stuff is pretty weird, a generator would make
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a lot more sense, but probably due to backwards compatibility
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this is still the way how it works.
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The only important part is stuff in the ``state == 0`` flow,
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everything else has been copied from the ``rlcompleter`` std.
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library module.
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"""
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if state == 0:
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sys.path.insert(0, os.getcwd())
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# Calling python doesn't have a path, so add to sys.path.
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try:
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logging.debug("Start REPL completion: " + repr(text))
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interpreter = Interpreter(text, [namespace_module.__dict__])
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completions = interpreter.complete(fuzzy=fuzzy)
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logging.debug("REPL completions: %s", completions)
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self.matches = [
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text[:len(text) - c._like_name_length] + c.name_with_symbols
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for c in completions
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]
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except:
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logging.error("REPL Completion error:\n" + traceback.format_exc())
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raise
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finally:
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sys.path.pop(0)
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try:
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return self.matches[state]
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except IndexError:
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return None
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try:
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# Need to import this one as well to make sure it's executed before
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# this code. This didn't use to be an issue until 3.3. Starting with
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# 3.4 this is different, it always overwrites the completer if it's not
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# already imported here.
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import rlcompleter # noqa: F401
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import readline
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except ImportError:
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print("Jedi: Module readline not available.")
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else:
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readline.set_completer(JediRL().complete)
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readline.parse_and_bind("tab: complete")
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# jedi itself does the case matching
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readline.parse_and_bind("set completion-ignore-case on")
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# because it's easier to hit the tab just once
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readline.parse_and_bind("set show-all-if-unmodified")
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readline.parse_and_bind("set show-all-if-ambiguous on")
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# don't repeat all the things written in the readline all the time
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readline.parse_and_bind("set completion-prefix-display-length 2")
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# No delimiters, Jedi handles that.
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readline.set_completer_delims('')
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def version_info():
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"""
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Returns a namedtuple of Jedi's version, similar to Python's
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``sys.version_info``.
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"""
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Version = namedtuple('Version', 'major, minor, micro')
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from jedi import __version__
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tupl = re.findall(r'[a-z]+|\d+', __version__)
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return Version(*[x if i == 3 else int(x) for i, x in enumerate(tupl)])
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